Bob Walks to the Store

Bob was at his house and had a sudden urge for candy bars. He realized he had none left and decided to go to the store. The store was about 300 ft from bobs house. Bob started walking at a constant rate to the store. After a minute of walking he tripped on a crack in the concrete. He hit his head hard on the ground and was knocked out. He laid there for nearly a minute and then woke up. He started walking back at a constant rate. He walks past his house and toward the hospital. The hospital was about 300 ft away from bobs house too. It takes him 2 min to get to the hospital.